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Old 04-07-2004, 08:51 PM   #1
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Baffled ... Help! Linux can't ping Windoze!

Hi all,

Well, I'm a bit baffled and I hope someone here can tell me what I'm missing. I've been at this for hours, but don't feel any close to figuring this out.

I have 5 recently installed RH9 boxes, all up and running, and able to ping each other, ping the router, ping my wireless acces point, even ping a Mac on the network. However, I can't ping the two Windoze machines on the network. Both are Win2k. However, the Win2k boxes can ping everything else, including the RH9 systems.

I should specify that all the pinging being done is all IP address based -- not NetBIOS or hostnames. All IP numbers, so this isn't a DNS or name lookup issue. (At least I don't think so!) Oh, and the Linux machines can see the outside network beyond the firewall -- I can ping the Internet with both IP address and qualified name.

Let me eliminate the obvious right off the bat:

- none of the machines, Linux or Windows, is running any firewall
software of any kind -- in other words, no ICMP blocking

- every machine has an IP address of the form and
netmask of

- all have the same gateway:

- all machines are on the network and showing up properly on the
swith -- i.e. they are coming up in their proper speed, duplex, etc
on the switch

So all that said, am I missing something? Anyone got any ideas?

Thanks so much,


Last edited by eafurie; 04-07-2004 at 11:18 PM.
Old 04-08-2004, 02:14 AM   #2
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have u tried "traceroute" ?
does ping say "Destination Host Unreachable"?
Old 04-08-2004, 03:44 AM   #3
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What does the arp table show? arp -a
Does the linux have arp entries for the windows machines?
Old 04-08-2004, 04:10 AM   #4
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as i know when computers comminucate each other which is in same network, they comminucates on MAC id. arp table shows the mac id of computers which is comminucated. actually when a box wants to comminucate with others. first it checks if they r in same network. if they r in same network, it will do broadcast to find make id of the ip. and it writes this id in arp table. so when it need to comminucate with same ip it wont need to do broadcast. if all of them (linux and windowz) uses TCP/IP, they must have arp tables. otherwise your network would be full of broadcast packets.

i tried to explain arp table, im not an expert.
Old 04-08-2004, 04:15 AM   #5
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i am sorry. i didnt check your nick. so i thought eafurie asked me a question.


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